BOSTON -- Less than two weeks removed from a slide that threatened to derail their season, the New York Yankees are on the cusp of another postseason berth.
New York has beat Boston 12 straight times dating to last season, tying the Yankees' longest winning streak in baseball's most historic rivalry.
"It's probably a little bit fluky, a little aberration," Yankees manager Aaron Boone said. "It's a collection of a few series where obviously they haven't quite been the same team this year."
New York was on a 5-15 slide and missing star sluggers Aaron Judge and Giancarlo Stanton before starting this streak. Now, the Yankees' magic number is one to ensure themselves a fourth consecutive postseason berth. The Yankees can clinch Sunday with a win or a loss by the Seattle Mariners.
The Yankees improved to 31-21 and earned their 28th consecutive winning season, the second-longest streak in big league history behind their 39 in a row from 1926-64.
Happ (2-2) allowed four hits and struck out nine. It's his second win of the season over the Red Sox. He allowed one run over 5 2/3 innings in a victory against them last month in New York.
He said the way he's been able to turn his season around after a slow start is something he isn't taking for granted.
"I don't think I can put it into words," Happ said. "I appreciate the support from the players here in this room. It certainly means a lot and feels good."
Happ has a 3.25 ERA over 44 1/3 innings pitched this season. That is second on the team among pitchers with at least five starts, behind only ace Gerrit Cole (3.00).
"Just a good job of executing all night," Yankees' manager Aaron Boone said. "He's just in a really good place on the mound right now."
Frazier finished with three of the Yankees' 11 hits.
Boston starter Chris Mazza (1-2) lasted four innings, giving up four runs on five hits and three walks.
He struggled from the outset, giving up a hit and pair of walks to load the bases in the first.
The Yankees benefited from two errors by Boston shortstop Xander Bogaerts to add two more runs in the fourth.
First, Bogaerts couldn't get the ball out of his glove to start a double play, allowing Frazier to advance to second. Frazier then scored off a Kyle Higashioka's single to right field.
With runners on first and third, Tyler Wade hit a ground ball to Bogaerts, who stepped on second for a force out but overthrew first baseman Bobby Dalbec as he tried to turn the double play, allowing Mike Tauchman to score.
"We played so well yesterday and then today didn't look like the same guys," Red Sox manager Ron Roenicke said.
Boone said Happ will definitely be part of the Yankees' postseason plans. How much is to be determined.
"We'll see," Boone said. "He's obviously going to be on the team and playing a big role. But we'll cross that bridge over the next 10 days."
Red Sox: 2B Christian Arroyo left the game with back spasms. ... Outfielder Alex Verdugo sat out Saturday with left hamstring soreness after leaving in the third inning of Friday's loss. Manager Ron Roenicke said his status for Sunday is to be determined. ... IF/OF Yairo Munoz was placed on the 10-day injured list with a lower back strain.
"There could be another hearing and more information to be inserted in there," Boone said. "It could be something that could even be put off until next year."
Chapman has previously said the pitch was not intentional.
Yankees: Right-hander Deivi Garcia (2-1, 3.28 ERA) will make his fifth start of the season in Sunday's series finale. He gave up six hits and three runs over seven innings to get the victory in the Yankees' 20-6 win over the Blue Jays on Tuesday.
Red Sox: Right-hander Tanner Houck (1-0, 0.00) allowed two hits, no runs and struck out seven over five innings in his lone start of the season last week at Miami.
More AP MLB: https://apnews.com/MLB and https://twitter.com/AP-Sports
Alternate, developmental sites to return for MLB teams in 2021, as Triple-A season gets delayed by at least one month, sources say
While AAA, the highest level of minor league baseball, was scheduled to begin April 6, games will be pushed back to around the same time that AA, High-A and Low-A are expected to start -- the first week of May, sources told ESPN on Tuesday.
White Sox take early lead on Vaughn's 3-run homer
Andrew Vaughn hits a three-run home run to left field to give the White Sox a 3-0 lead over the Rangers in the bottom of the first inning.
Ortega hustles out 3-run triple in 4th
Rafael Ortega knocks a three-run triple in the fourth to put the Cubs up vs. the Royals.
McNeil, Almora Jr. crank homers in Mets' win
Jeff McNeil and Albert Almora Jr. each hit home runs as the Mets take down the Astros 2-0.
Rio Gomez is excited to get back to baseball in 2021
Red Sox prospect Rio Gomez, son of the late Pedro Gomez, describes getting back to playing baseball as "the light at the end of the tunnel" for him.
Padlo rips deep homer off centerfield light tower
Rays' third baseman Kevin Padlo hits a long home run that hits the centerfield light tower.